Title :
Low Threshold Current Single-Fundamental-Mode Photonic Crystal VCSELs
Author :
Xie, Yi-Yang ; Kan, Qiang ; Xu, Chen ; Zhu, Yan-Xu ; Wang, Chun-xia ; Chen, Hong-Da
Author_Institution :
Key Lab. of Optoelectron. Technol., Beijing Univ. of Technol., Beijing, China
fDate :
3/15/2012 12:00:00 AM
Abstract :
An optimization of oxide aperture diameter to match the light emission aperture (the central defect region) in the photonic crystal vertical-cavity surface-emitting laser (PhC-VCSEL) is presented in order to obtain low threshold current and high single-fundamental-mode output of the device. A 3-D finite-difference time-domain method has been applied to simulate the mode field distribution and quality factors (Q factors) of fundamental and high order transverse modes which correspond to the mode loss of the PhC-VCSEL cavity. Single-fundamental-mode operation of PhC-VCSEL with 1.7-mW output power and low threshold current of 0.7-mA is demonstrated after oxide aperture optimization.
Keywords :
Q-factor; finite difference time-domain analysis; photonic crystals; surface emitting lasers; 3D finite-difference time-domain method; Q factors; VCSEL; current 0.7 mA; light emission aperture; low threshold current single-fundamental-mode photonic crystal; mode field distribution; oxide aperture diameter optimization; power 1.7 mW; quality factors; vertical-cavity surface-emitting laser; Apertures; Cavity resonators; Optical losses; Photonic crystals; Threshold current; Vertical cavity surface emitting lasers; Low thershold current; photonic crystal; single-fundamental-mode; vertical-cavity surface-emitting lasers (VCSELs);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2179796
